Mango ban: what other foods have been prohibited?

Kitchen staff at a school in Essex were bamboozled in 2013 when they were
banned from making triangular flapjacks. The rule was imposed after a child
was hit in the face by one of the oat-based snacks, leading to concern that
three-sided desserts were ‘dangerous’. "It’s the most
ludicrous thing I’ve heard," one insider at the school complained.